Within seconds, Eva arched her body against his mouth and she began to convulse wildly.

And depending on the gas and its concentration, birds may convulse wildly, even break their wings.

I jumped to my feet as he fell to the ground, convulsing wildly.

The horse halted, and before she could think, she convulsed wildly, trying to fling herself off the saddle, screaming as loudly as her gag permitted.